Dev-PHP is a well-featured IDE for PHP. Fast and powerful, it is easy to use and has a lot of cool features : class browser, scripts preview, integration with PHP parsers, PHP-GTK library, and Xdebug of course. Dev-PHP-usb slips even into your pocket.

XML_XSLT2Processor is a PHP class that allows you to perform XSLT 2.0 transformations within PHP by using SAXON or AltovaXML. All with the ease of the PHP XSL extension. Documentation is available from the project's Wiki.
NOTICE:
This project is now dead. See the following news item for details on why and what to use instead:
https://sourceforge.net/p/xslt2processor/news/2013/12/project-is-now-dead-for-the-best-reason-imaginable/

RightNowCMS proposes the development of dynamic web pages using environment databases, MySQL for now, or simulated dynamic NoDB virtual version. We plan to implement a set of extensions and modules for increase the functionality of your website.

Webstensible is an extensible application layer for building robust, web-based business applications. The framework is written in DotNet. All components are loaded via reflection and designed to be replaced to match ever-changing business requirements.